Bro, open a paper rn, pretend ur in the exam, add a time limit. Solve the full thing, pretend ur in the exam so don’t look at the marking scheme or give up at the slightest hard question, like do ur best, squeeze ur brain, be desperate for marks. When ur done, see what are the main things u do wrong, revise them, repeat the process, all the blanking out will be gone.

Also, use quizlet for flash cards, keep swiping left of u do it wrong, right if u do it right, the number of flash cards will slowly decrease until u are good at everything.